Question

Classification of microorganisms on the basis of water activity

Answer 1

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Water activity or aw is the partial vapor pressure of water in a substance divided by the standard state partial vapor pressure of water. In the field of food science, the standard state is most often defined as the partial vapor pressure of pure water at the same temperature.
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Answer 2

Facultative: Microorganisms that can grow in both presence and absence of oxygen e.g. yeasts. potential. C) On basis of requirement of water activity. In general, bacteria require more moisture than yeasts and yeasts more thanmolds.

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